Hi all, thanks for bringing this to our attention. We've changed the wording to:
'Note: This topic is primarily for users to flag spam and glaringly obvious trolls to the Night Watch team. If there's a poster who's really worrying you, please do report it to MNHQ in the usual way.'
Which is hopefully a bit clearer. Our nightwatchers only hide spam or incredibly obvious trolls - any other judgement calls are for MNHQ to make. Please do feel free to flag trolls and spam here, and as always - let us know by hitting the report button and we will get to it as soon as we can. 